Tabor Electronics Ltd. - OED

Reference Clock
INT
Rotate the dial to select between the available clock
options.
3-17. Generating Sequenced
Waveforms
In general, whenever the SEQ LED above the [WAVE-
FORM] button is lit, the model 8024 outputs a sequence
of waveforms.
3-17-1. What Are Seq. Waveforms
In paragraph 3-16 we explained to you what are arbitrary
waveforms. You may want to go back and refresh
your memory on this topic. Sequenced waveforms are
made of a number of arbitrary waveforms which can
be linked and repeated in various manners.
Sequenced waveforms can be generated from waveforms
which are stored in different segments of the
arbitrary memory. Before you can use output a sequence
of waveforms, you must first load your arbitrary memory
with the required waveforms. Waveforms can be
loaded either from the front panel or through GPIB
programming. Information how to partition the memory
and load front panel functions is given in paragraph
3-16-3 and 3-16-4. Information how to load your memory
from the GPIB is given in section 4 of this manual.
Figure 3-2. Waveform in Segment 1.
Figure 3-3. Waveform in Segment 2.
An example how sequenced waveforms work is demonstrated
in the following figures. Figure 3-2 shows
a sine(x)/x waveform which was loaded in segment 1.
Figure 3-4. Waveform in Segment 3.
Figure 3-5. Sequenced Waveforms.
Figure 3-3 shows a sine waveform which was loaded
into segment 2, and Figure 3-3 shows a pulse waveform
which was loaded into segment 3. The sequence generator
lets you link segments in user defined order and
repeat each segment as many times as needed.
Figure 3-4 shows a sequence of waveforms which
was made of the waveforms that were stored in three
different memory segments. You may notice that segment
number 2 is generated first and repeated twice,
segment 3 follows once, then segment 1 is repeated
four times.
3-17-2. Generating a sequence
Assuming that you already loaded waveforms into memory
segments, proceed to generate a sequence as explained
in the following.
Press the [WAVEFORM] button until the SEQ light
turns on. Observe that the display reads as follows:
Output sequence
1 (Empty)
Operating Instructions
The “(Empty)” reading will remain until you program
the first sequence. The “(Empty)” reading is associated
with the sequence number - “1" which is shown
on the left. It will change to ”(Loaded)" after programming
a sequence.
Nine different sequences can be programmed from
the front panel. The sequences are selected by rotating
the dial. If a selected sequence is “(Empty)” the output
will generate 0 V dc level. To program the first sequence
3-11